Self-compression by femtosecond pulse filamentation: Experiments versus numerical simulations
| Autor: | Stefan Skupin, Luc Bergé, Falk Lederer, Nickolai Zhavoronkov, M. Schnürer, G. Stibenz, Günter Steinmeyer, Thomas Sokollik |
|---|---|
| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Physical Review E. 74 |
| ISSN: | 1550-2376 1539-3755 |
| DOI: | 10.1103/physreve.74.056604 |
| Popis: | We analyze pulse self-compression in femtosecond filaments, both experimentally and numerically. We experimentally demonstrate the compression of 45 fs pulses down to a duration of 7.4 fs at millijoule pulse energies. This sixfold compression in a self-generated filament does not require any means for dispersion compensation and is highly efficient. We compare our results to numerical simulations, providing a complete propagation model that accounts for full dispersion, pressure variations, Kerr nonlinearity and plasma generation in multiphoton and tunnel regimes. The equations are numerically integrated and allow for a quantitative comparison with the experiment. Our experiments and numerical simulations reveal a characteristic spectrotemporal structure of the self-compressed pulses, consisting of a compressible blue wing and an incompressible red pedestal. We explain the underlying mechanism that leads to this structure and examine the scalability of filament self-compression with respect to pulse energy and gas pressure. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|